Attenuation of Sound in a Liquid Medium

The intensity of the ultrasonic wave decreases with increasing penetration into the medium. Molecular vibration induced by the sound wave results in loss of intensity of the wave, which is transformed into heat. Heating occurs in the sites of compression and cooling at the sites of rarefaction. Since the compressibility of liquids is small, there is little heating caused by ultrasound as waves pass through the medium. The heating effect is caused by the degradation of acoustic energy due to absorption, following the equation:

where I is the intensity at distance d from the ultrasound source and a is the absorption coefficient.

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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